Lub tsuas yog lub cim rau gram uas tau lees paub los ntawm International System of Units (SI) yog "g" ua raws li tus lej suav nrog qhov chaw, xws li hauv "640 g "sawv rau "640 grams" ua lus Askiv.
Vim li cas gram tsis yog SI unit?
Lub hauv paus yav dhau los, gram, tau hloov los ntawm kilogram hauv xaj kom tau txais kev sib raug zoo nrog cov tswv yim ua haujlwm ampere thiab volt. Nyob rau hauv 1874 lub mechanical units cm, g, s ('CGS') tau saws raws li lub coherent system ntawm units rau science.
g thiab nws lub SI yog dab tsi?
In SI units, G muaj tus nqi 6.67 × 10-11 Newtons kg -2m2. Kev taw qhia ntawm lub zog yog nyob rau hauv txoj kab ncaj nraim ntawm ob lub cev thiab yog qhov txaus nyiam. Yog li ntawd, ib tug txiv apples poob los ntawm tsob ntoo vim nws xav tias lub gravitational quab yuam ntawm lub ntiaj teb thiab yog li raug rau "lub ntiajteb txawj nqus".
Yuav suav tias yog SI unit?
Lub SI system, tseem hu ua metric system, yog siv thoob ntiaj teb. Muaj xya chav nyob hauv SI system: lub meter (m), kilogram (kg), qhov thib ob (s), kelvin (K), ampere (A), lub mole (mol), thiab lub candela (cd).
SI unit length yog dab tsi?
The meter, cim m , yog SI units ntawm qhov ntev. Nws yog txhais los ntawm kev noj cov lej tas li ntawm qhov ceev ntawm lub teeb hauv lub tshuab nqus tsev c kom 299 792 458 thaum qhia hauv chav tsev m s- 1, qhov twgthib ob txhais tau hais tias ΔνCs.
